function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annales de la Société d\'Histoire Naturelle de Maurice', 1],
    ['Bulletin de la Société Philomathique de Paris, Série 7', 1],
    ['Cybium', 1],
    ['European Journal of Taxonomy', 1],
    ['K. Danske Vidensk. Selsk. Naturvid. Math. Afhandl.', 1],
    ['Laurentius Salvius', 2],
    ['Mitteilungen aus dem Zoologischen Museum in Berlin', 2],
    ['Nature', 1],
    ['Proceedings of the American Philosophical Society', 1],
    ['Sanfilippo', 1],
    ['Zoologica', 1],
    ['Zootaxa', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);